Telegraph-transmitter.



G. E. SGRIBNER.

TELEGRAPH TRANSMITTER.

APPLICATION FILED 110V. 28, 11111. 11111111111111 AUG. 14, 1913.

1,75,54.-. Patented 061.14, 1913.

hive/770w.-

CHARLES E. SCRIBNER, OF JEEICHO. COMPANY, OF NEW YORK,

VERMONT, ASSIGNOR TO WESTERN ELECTRIC N. Y., A CORPORATION OF ILLINOIS.

TELE GRAPH-TRANSMITTER.

Specification of Letters Patent.

Patented Oct. 1451913.

Application filed November 28, 1911, Serial No. 662.846. Renewed August14, 1913. Serial No. 784,792.

To all whom it may concern:

Be it known that 1, CHARLES E. SoumNER, citizen of the United States,residing at Jericho, in the county of Chittenden and State of Vermont,have inventeda certain new and useful Improvement in Telegraph-Transmitters, of which the following 15 a full, clear, concise, andexact description.

This invention relates to printing telegraphs, and more particularly toa printing telegraph transmitter from which combinations of selectingimpulses are sent over two main line conductors to a receiver located ata distant station.

An object of this invention is to provide an impulse transmitter capableof sending a plurality of characteristic impulses, there being onecontrolling relay for each characteristic impulse.

Another object of this invention is to provide a transmitter in whicha'combination of two impulses is sent by a single contact closing actionof a key and in which the number of parts necessary for a successfuloperation of the device is reduced to a minimum.

In the drawings is shown a diagrammatic illustration of the systemembodying my invention and in which the mechanical details of the keylever is shown in perspective.

The main line conductors L and L are adapted to be intermittentlyconnected with a source of current 110 through the medium of the currentcontrol relays 100, 101, 102, 103, 104 and 105. These relays 100 to 105,inclusive, may be selectively operated in predetermined groups tointermittently connect the source of current 110 to the main lineconductors L and L to send a combination of impulses over the lineconductors.

The form of key used to selectively control the circuit through thecurrent control relays consists of a plate 120, carrying at the frontthereof a slotted bar 121, and carrying intermediate its ends atransverse bar 122, to which is pivoted in a convenient manner the keylever 123. A stop plate 124 is provided to limit the verticalmovement ofthe key. The key lever is held in its normal position by the spring 125.A rearward extension 126 of the key lever 123 is adapted on the downwardstroke of the key to move into engagement with a sliding button 127,which button is carried on the rod 128. Mounted on a plate 129..attached to the side plate 120, are two contact springs 130, thesesprings in the normal position of the key lever being held apart by thetube 131, also mounted on the rod 128. A contact block 132 with whichboth the springs 130 contact in the lower position of the key lever isconnected to ground through the conductor 150. W'hen the key lever isdepressed the extenmen 126 moves into engagement with the button 127 andthe rod 128 and tube 131 are moved downwardly through perforations inthe plates 121 and 129. When the tube 131 passes below the springs 130,these springs move into engagement. with the block 182, completing acircuit through a selected current control relay in a manner to behereinafter described. Upon the release of the key lever it is returnedto its normal position by the spring 125, and the tube 131 is movedbetween the springs 130, moving the same from engagement with the block132.

Let it be assumed that the operator wishes to send a combination ofimpulses over the main line conductors to select a character at thedistant station. Let it be further assumed that she desires to select atthe distant station the character E and that the combination of impulsesto select this character is composed of two impulsesa positive impulseover line L followed by a negative impulse over line D. The key corresponding to this character is depressed allowing the contact springs130, controlled thereby, to move into engagement with the contact block132. circuit is closed which may be traced from battery 151, transferrclay 152, lever 153, through one of the energizing windings of thecurrent control relay 100, I conductor 154, contact spring 130, contactblock 132, conductor 150, to ground. As a result of the closure of thiscircuit current control relay 100 is energized attracting its armatures,placing the positive pole of battery 110 to the main line conductor LTransfer relay 152 is energized, attracting its armature therebybreaking the circuit through the current control relay 100 at the lever153, which is thereby deenergized, removing the battery 110 from theline L and thus determining the length of the first impulse of thecombination. When the armature of transfer relay 152 moves intoengagement with the lever 153, a circuit is closed which may be tracedfrom battery 151, transfer relay 152, armature thereof, energizingWinding of the current control relay 101, conductor 155, contact spring130, contact block 132, conductor 150, to ground. The battery 110 isagain connected to the main line conductor L but in this instance thecurrent control relay 101 connects the negative pole of the battery tothe line. The length of this second impulse of a combination Will bedetermined by the tube 131, moving into engagement with thecontactsprings 130, moving them out of engagement With the contactblocks" 132, thus removing ground from the selecting circuit, and allparts of the device return to normal.

Any other combination of character selecting impulses may be sent in themanner described. In each instance -tWo current control relays areselected, the selecting circuit passing through the transfer switch. Theapplication of current for the first impulse is controlled by the propercurrent said current control means, and a transfer relay'operating tocause the successive en- 'ergization of the selected group ofcurrentcontrol means. a

2. In an electrical impulse transmitter i Witnesses:

for transmitting a series of characteristic impulses, the combinationof. a series of current control means, one for each characteristicimpulse, means for simultaneously selecting a group of the currentcontrol means, and electromagnetic means for causing the successiveoperation of said selected current control means.

3. In an electrical impulse transmitter, the combination of a pluralityof current control means, means for simultaneously selecting apredetermined group of said current control means, a source of currentcontrolled by said current control means, and electromagnetic means forcausing the successive operation of the selected group of currentcontrol means to send a combination of impulses from said source ofcurrent to a main line,

4. In an electrical impulse transmitter, the combination of two mainline conductors, a source of current adapted to be intermittentlyconnected to said main line conductors, current control relays, andmeans for selectively operating said current control relays in pairs, atransfer mechanism for shiftingthe control of said source of currentfromone to the other of said selected pair a of current control relays.

.In Witness whereof, I hereunto subscribe my name this 21st day ofNovember A. D., 1911. I a CHARLES E. SORI-BNER.

IRVING MACDONALD, F. P. MoIN'rosH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of fatents Washington, D. G.

